---
title: "🇺🇸 US Markets Crashed — Fed, KOSPI & AI Fatigue Explained"
ticker: "SPX:NDX:DJI"
date: "2026-06-23"
tags: ["us-markets","crash","fed","semiconductors","ai-fatigue","nifty"]
summary: "Deep-dive on the June 23 US market crash. Nasdaq futures -2.1%, S&P 500 -1.04%. KOSPI circuit breaker #4, Fed rate hike odds at 90% by Sep, AI capex fatigue, and impact on your portfolio."
model: "deepseek-chat"
---

# 🇺🇸 US Markets Crashed — June 23, 2026

*Analysis by deepseek-chat*

**Nasdaq Futures:** -2.1% | **S&P 500:** -1.04% | **Dow Futures:** -0.7%

---

## 4 Reasons Why

### 1. KOSPI Contagion
KOSPI circuit breaker  triggered at -10%. Samsung & SK Hynix -12% each (half the index's market cap). Spilled into US semis premarket.

### 2. Fed Rate Hike Fears
Fed Chair Kevin Warsh hawkish. 90% probability of Sep rate hike. Dollar at 1-yr high (101.13). 2Y Treasury at 4.236% (16-mth high).

### 3. AI Infrastructure Fatigue
SoftBank -15%, Kioxia -10%, ASML -4%, Infineon -3.4%. Markets questioning AI capex returns.

### 4. Global Risk-Off
KOSPI -10% ⛔ | Nikkei -3.55% | Stoxx 600 -1% | DAX -1.2% | Hang Seng -1.7%

---

## Portfolio Impact
- 🔴 **AMD, SMH, GOOGL, PLTR** — directly in the line of fire
- 🟡 **VOO, LMT, TSLA** — relatively insulated
- ✅ **Key Catalyst:** Micron earnings Wednesday — can reverse or extend the rout

*Sources: Morningstar/DJ, CNBC, Schwab, Trading Economics. Model: DeepSeek Chat.*